ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, cilt.71, 2015 (ESCI)
The title compound, C21H21NO5, crystallizes with two molecules in the asymmetric unit. In each molecule, the central 1,4-dihydropyridine ring adopts a shallow sofa conformations (with the C atom bearing the phenol ring as the flap), whereas the pendant cyclohexene rings both have twisted-boat conformations. Each molecule features an intramolecular O-H center dot center dot center dot O hydrogen bond, which closes an S(8) ring. In the crystal, the molecules are linked by O-H center dot center dot center dot O, C-H center dot center dot center dot O and C-H center dot center dot center dot pi interactions, forming a three-dimensional network.